The Women's Patagonia Lost Canyon Vest is a breathable shell made from polyester (70% recycled) taffeta with four-way stretch, allowing a full range of motion, and a recycled polyester lining that glides over layers. The vest is insulated with lightweight 80-g Thermogreen recycled polyester to minimize bulk and take the chill off on cooler evenings. Zippered front pockets have been lined with cozy tricot to keep the hands warm and valuables secure. Slight drop-tail hem with elastic adds warmth and provides bum coverage. Its relaxed, oversized fit allows easy, comfortable layering over sweaters and fleece.